Most investors know that the S&P 500 hit a record high in October 2007 and a (the?) low in March of this year. But when you break it down by sector, things are a bit more complicated.

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Otherwise, for those who are wondering whether there is more upside ahead, the fact that four groups — telecom services, financials, energy, and utilities — have not seen new highs this month while the S&P 500 has might be a cause for concern.